I had the same issue myself and could fix it by adding the repositories. It might be that you cant install the missing packages with apt-get, but it should work by installing SleepAnalyser. (As the repos are from Nokia, the access might be somehow restricted).
If it still doesnt work out, you can search the packages with tpe package search: http://maemo.org/packages/ Then download the SDK version (Fremantle SDK free armel) and install it with dpkg: dpkg -i PACKAGENAME.deb